NIOS II memory to access from hardware block

[AnushaManoj]

Hello all,

I have a question regarding NIOS II processor. I have some situation where I have to send some allocated memory (By NIOS II software running on it) data to the hardware processing block. I am using on-chip memory as of now as the memory for NIOS II memory.

To get my work done I am thinking that, if I connect another Avalon Master port from my hardware block to the on-chip memory slave port, and then send the start of the memory address I want to copy, to the hardware block(maybe from custom instruction).  Then the hardware block would read and write directly from on-chip memory. (Making sure that there are no concurrent access to the same memory locations)
Is there any complications doing this? have anyone tried this before?

[EricMunYew_C_Intel]

Hi, Manoj

You may consider the mSGDMA IP, you may refer to page 325 of below document:

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_embedded_ip.pdf

Thanks.

Eric

[EricMunYew_C_Intel]

Hi, Manoj

Do you have any inquiry ?

Thanks.

Eric

[AnushaManoj]

Hi Eric,

Thank you for your kind reply and apologies for the delay. I have managed this through memcpy function in C and attaching a RAM module via avaoln memory-mapped bus.

DMA was a bit enefficient for mycase because the amount of data transfered is not big, so initiating DMA takes more time.